Universal hydraulic testing machine

The utility model provides a hydraulic testing machine, which comprises a mount, wherein an oil cylinder is arranged on the mount; the upper end of an oil cylinder rod is connected with a workbench; a vertical column is fixedly arranged on the workbench; an upper transverse beam is fixed arranged at the upper end of the vertical column; a lower transverse beam is arranged between the upper transverse beam and the workbench; a screw rod, which is fixed arranged on the mount and penetrates through the workbench is screwed on the lower transverse beam; a jig is arranged among the upper transverse beam, the lower transverse beam and the workbench; a sample is clamped by the jig. The universal hydraulic testing machine is characterized in that a photoelectric encoder is fixedly arranged on the vertical column; a load sensor is arranged on the jig; an extensometer is arranged on the sample; an electro-hydraulic proportion control valve is connected with the oil cylinder and is used to control the oil cylinder; the photoelectric encoder, the load sensor and the extensometer are all connected with a signal modulator which is connected with a data collection card; the electro-hydraulic proportion control valve is connected with a servo amplifier which is connected with the data collection card; the data collection card is connected with a computer through a data bus. The universal hydraulic testing machine is reliable in work and easy to maintain.